Preheat the oven to 400° F.
Line 2 baking sheets with parchment paper or silicone baking mats.
In a large mixing bowl, add flour, sugar, baking soda, baking powder and salt.
Combine the ingredients above.
In a small bowl, add the buttermilk, egg, lemon juice and zest. Combine well.
With the help of a pastry cutter, combine the butter into the dry mixture.
Make a well in the center of the mixture above. Pour the wet ingredients in the well.
Stir everything together until just about combined. The dough will be very crumbly.
Add the blueberries and white chocolate to the mixture. Gently stir together.
Turn the dough out onto a lightly floured work surface or a sheet of parchment paper and shape it into a rectangular shape with your hands. I like to use the parchment paper because it makes the cleanup very quick and easy. Be careful not to overwork the dough!
Gently roll the dough out with a rolling pin until it's about 1/2 inch thick. Cut into circles (or any shape you would like frankly). Re-roll any scraps until you have used up all the dough. Place in on a parchment paper-lined baking sheet
Bake for approximately 14 to 18 minutes depending on size. They should be golden brown.
Let cool a bit and serve!